Caffine is a funny thing. IT speeds up your metabolism temporarily, but it also dehydrates you, so your body will hold onto water weight. The worste thing about coffee is what you put into it, sugar, milk, cream, sweetener........

Yes, it can do. Some people lose additional pounds after stopping coffee. Studies have shown that caffeine (as in coffee and some sodas) contributes to insulin resistance (thus making it harder to lose weight), increases appetite (again making it harder to lose weight) and contributes to food cravings (making it difficult to adhere to a weight loss diet). In those studies, even decaffeinated coffee is shown to be detrimental to weight loss.Thanks

As long as you account for the calories you consume when you have a coffee and are getting the right nutrients in the rest of your diet, then no.

However obviously more than 1 coffee a day and your risking pushing your calorie intake over the limit unless you skip a meal (which is bad!) so... either go with a lower calorie coffee than what you were doing, reduce the amount of coffee, but you don't have to eliminate it completely if it's something you enjoy.